package job.sll;
import java.util.*;

public class sll1 {
    public static void main(String[] args) {
        int age = 20;
        Student student = new Student();
        student.age = age;
        up(age);
        up(student);
        System.out.println(student.age + "==" + age);
    }

    public static void up(Student s) {
        s.age++;
    }

    public static void up(int age) {
        ++age;
    }
}

class Student {
    public int age;
}
